Definition: Naturally occurring hydrogen gas found in the Earth’s crust or atmosphere, without human industrial processing.
Also Known As: White hydrogen, gold hydrogen, geological hydrogen.
Distinction:
Green Hydrogen: Produced from renewable energy sources via electrolysis.
Blue Hydrogen: From natural gas with carbon capture and storage (CCS).
Grey Hydrogen: From fossil fuels without CCS.
Current Trend: Increasing interest from major industries (e.g., mining, energy) due to its potential as a clean, naturally available energy source.
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